Got "Tough enough" for finishing the game on hard and a few others for collectiong all the relics etc.
Last to silvers are for completing the timetrials or the "Lost Island" chapter and the croft mansion.

God of War 3
Feather Plucker (find all phoenix feathers)
Eye Candy (find all gorgon eyes)
Are you horny to win (find all minatour horns)
Maxed out (fully upgrade all weapons)
aMAZEd (Complete labyrinth without dying)
King of the Hill (Platinum)

9th Platinum WOOT WOOT

I wonder when a nuclear warhead goes off, does the frame rate of real life drop?

Alice: Madness ReturnsMadness Begins (Bronze) In American McGee’s Alice, Complete Village of the Doomed

Modern Warfare 3
Back in the Fight (Bronze) Start the Single Player Campaign on any difficulty.
Too Big to Fail (Bronze) Destroy the Jamming Tower. Complete "Black Tuesday" on any difficulty.
Wet Work (Bronze) Take back New York Harbor. Complete "Hunter Killer" on any difficulty.
Carpe Diem (Bronze) Escape the mountain safe house. Complete "Persona Non Grata" on any difficulty.
The Big Apple (Silver) Complete "Black Tuesday" and "Hunter Killer" on Veteran difficulty.
This Is My Boomstick (Bronze) Kill 30 enemies with the XM25 in "Black Tuesday."
What Goes Up... (Bronze) Destroy all the choppers with only the UGV's grenade launcher in "Persona Non Grata."